Terpene derivatives

ABSTRACT

1. A COMPOUND OF THE FORMULA   6,6-DI(H3C-)-NORPINAN-4-YL-CH2-CH2-O-CH2-CH2-N(+)(-R1)   (-R3)-R2&#39;&#39; X(-)   IN WHICH X IS SELECTED FROM THE GROUP CONSISTING OF CHLORO AND BROMO, R1 AND R2 TAKEN SEPARATELY ARE ALKYL HAVING 1-2 CARBON ATOMS AND TEKEN TOGETHER WITH THE NITROGEN ATOM TO WHICH THEY ARE ATTACHED FORM A MEMBER SELECTED FROM THE GROUP CONSISTING OF MORPHOLINO, PIPERIDINO AND PYRROLIDINO, R3 IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF BENZYL, 2-BROMO-4,5-DIMETHOXY-BENZYL AND 2BROMO-4,5 DIETHOXY-BENZYL.

United States Patent Oflice 3,845,048 Patented Oct. 29, 1974 3,845,048 TERPENE DERIVATIVES Rene Baronnet, Paris, France, assignor to Societe Berri- Balzac, Paris, France No Drawing. Continuation-impart of abandoned application Ser. No. 160,182, July 6, 1971. This application Nov. 14, 1972, Ser. No. 306,434

Int. Cl. C07d 87/32 US. Cl. 260-2475 E 8 Claims ABSTRACT OF THE DISCLOSURE This invention relates to hydronopol derivatives having the formula:

in which R and R are each alkyl groups, or, together with the nitrogen atom to which they are attached, form a heterocycle, R is a benzyl optionally mono-, dior trisubstituted with alkoxy or halogen and X is halogen.

Said derivatives are useful antispasmodic drugs.

I cn, cm-onl-o-om-cng-N -m Xe 11,0

in which X is halogen R and R taken separately are alkyls having 1-6 carbon atoms and, taken together and with the nitrogen atom to which they are attached, form a 5-6 membered heterocycle containing a single nitrogen atom, and

R is a member selected from the group consisting of benzyl, benzyl mono-, diand tri-substituted with alkoxy having 1-6 carbon atoms or halogen. To prepare derivatives (1), a 6,6-dimethyl-norpinane having the formula may be quaternized with a compound R X, R R R and X having the above-defined meanings.

A process for the preparation of compounds '(II) is described in French Patent Application 70/27 908, filed July 29th, 1970, by Applicant, for Basic Diethyl Ether Derivatives, Process for Their Preparation and Applications Thereof.

This quaternization is conveniently carried out in a suitable anhydrous solvent, such as a ketone (e.g. acetone,

methylethyl ketone) at its boiling temperature, with an excess of R X. When the latter is volatile, the reaction is conducted under pressure in an autoclave, at a pressure between 10 and 20 kg./cm. for example.

To obtain the derivatives I in which X is C1, the corresponding derivative in which X is Br may be prepared first and its solution may then be percol-ated through an anion exchange resin in OH form, after which the aqueous ammonium hydroxide solution eluted from the column may then be neutralized with hydrochloric acid.

The following examples illustrate the invention.

EXAMPLE 1.-N benzyl N-{2-[2-(6,6-dimethyl-nor pinan- Z-yD-eth-oxy] ethyl} piperindinium bromide R =benzyl; Code No.=1708 Anhydrous acetone (250 ml.), 2-[2-(2-piperidino-ethoxy)-ethyl[-6,6-dimethyl-norpinane (27.9 g) and benzyl bromide (18.8 g.; 0.11 mole) are refluxed during twelve hours. The product crystallizes from acetone. It is suction-filtered and washed with ether, to give about 32 g. of product, m.p.=182 C.

The same procedure may be used to obtain the derivatives in which the piperidinium group is substituted by a dimethyl-ammonium, diethyl-ammonium or morpholinium group.

EXAMPLE 2.N,N-diethyl-N-(2-bromo-4,5-dimethoxybenzyl {2 [2-(6,6-dimethyl-norpinan-2-yl) -ethoxy]- ethyl} ammonium bromide =R =2-bromo-4,S-dimethoxybenzyl; Code No.=1712 2-[2-(2-diethylamino-ethoxy)ethyl] 6,6-dimethyl-norpinane (26.7 g.; 0.1 mole) and 2-bromo-4,5-dimethoxybenzyl bromide (31 g.) are boiled during 8 hours in methyl ethyl ketone ethyl ketone 250 ml.)

The methyl ethyl ketone is concentrated, and a just suflicient amount of ether is added. The reaction mixture is alowed to crystallize, to give 50 g. of product, m.p. C.

The same procedure may be used to obtain the derivatives in which the diethylammoniu'm group is substituted by a dimethyl ammonium, morpholinium or piperidinium group.

EXAMPLE 3.N (2 bromo 4,5-diethoxy benzyD-N- {2-[2- (6,6-dirnethyl-norpinan-2-yl)-ethoxy{ethyl} morpholinium bromide R =2-bronro-4,S-diethoxy-benzyl; Code No.=1716 2-[2-(2-morpholino-2-ethoxy-ethyl)] 6,6 dimethylnorpinane (2.81 g.; 0.01 mole) and 2-bromo-4,5-diethoxybenzyl bromide (3.34 g.) are refluxed during eight hours in anhydrous isopropan-ol (250 ml.)

The solution is concentrated and a sutficient amount of ether is added thereto. The solution is then allowed to crystallize.

About 5 g of crystalline quaternary ammonium derivative, m.p.t= C., are collected.

EXAMPLE 4.-N benzyl-N-N-dirnethyl {2-[2-(6,6-dimet-hyl-norpinan-Z-yl)-ethoxy]-ethyl} ammonium chloride R benzyl This compound is obtained from the corresponding bromide by anion exchange, operating as follows. An aqueous solution of 3 g. bromide in 25 ml. water is percolated through a column of an anion exchange resin in OH form -(8 g. of resin for a column having a diameter of 1.2 cm. and a height of 30 cm.). The aqueous ammonium hydroxide solution eluted from the column is collected until the liquid has become neutral. The aqueous solution thus collected is then neutralized with hydrochloric acid and then concentrated to dryness, in vacuo The residue is taken up into methyl ethyl ketone (3 ml.).

EXAMPLE 5.N-benzyl-N- {-2- [2- 6,6-dimethyl-norpinan-2-yl)-ethoxy]-ethyl} pyrrolidinium bromide The antispasmodic activity of derivatives (I) is also markedly higher than that of 'the reference compound 1694 in which R is methyl.

The derivatives which are tri-substituted are less toxic 5 than the derivatives in which R is benzyl and, for ex- R3=benzy1 Code ample, the toxicity of derivative 1717 is two times as low Anhydrous methyl ethyl ketone (250 ml.), 2-[2-(2-pyras papaverine hydrochloride. rohdino-ethoXy) ethyl]6,6jdimethyl-hofpihahe Further, derivatives (I) have the following properties: 0.1 mole) and benzyl bromide (18.8 g.; 0.11 mole) are exhibit no Side pharmacological ff t zig s ig iz w z' ,g gi g g 2They induce spasmolysis without modification of the e e 1 ue 3 en up 1 0 6 1e o peristalsis and alteration of the passage through the inproduct, m.p. =115 C.

In the following Table I are reported examples of detes mes rivatives (1) giving their code number (column 1), their 3They act 1h 81m and y P through the dlgestlve structure (columns 25), their molecular weight, their 15 Wall more dlfficulty than P P that Permlts a Selecpercent halogen content, and their melting point in C. tive action of the drug administrated per os.

TABLE I Molecular weight Percent bromine Melting Calcu- Caleupoint, Code number R R2 R9 X- lated Found lated Found 1691 Ethyl.--" Ethyl. Benzyl Br- 438 439 18 18.5 125 1699..--

Methyl Methyl -do. Br- 410 406 19.5 18.8 136 Morpholino do B1' 452 430 17. 7 18. 1 180 Ethyl Ethyl. 2-bromo4,5-dimethoxy-benzyl. Br- 577 598 13.9 14.2 90 Methyl Methyl 2-bromo-4,5-diethoxy-benzyl Br- 577 587 13.9 13.8 78 Morpholino -do Br- 619 629 12.9 12. 5 130 Morpholino 2-bromo-4,5-dimethoxy-benzyl Br- 591 605 13. 5 13. 9 ca 170 Ethyl Ethyl.-- 2bromo-4,5-diethoxy-benzyl- Br- Hygroscopic Pyrrolidino Benzyl Br- 436 418 18. 3 18. 5 115 Piperidino 2-bromo-4,b-dimethoxy-benzyl. Br- 589 576 13. 55 13. 75 163 1723.- Piperidino 2-bromo-4,5-diethoxy-benzyl Br 617 622 12.95 12.70 102 1694 Ethyl"... Ethyl Methyl I- Reference compound Derivatives (I) were found to possess both a papaverine-type musculotropic spasmolytic activity and an anticholinergic neurotropic activity.

In following Table II are reported results of pharmacological tests showing the comparative activities of a number of derivatives (1) and of derivative 1694 with respect to papaverine hydrochloride and atropine hydrochloride and the toxicity evaluated in mice by the method of Kar'ber und Behrens.

The determinations were carried out according to the conventional Magnus method in the ileum of guinea-pig. The minimum amount of product which, dissolved in 50 ml. of Tyrodes solution, is capable of effecting a 100% cancellation of the spasms within a period of time from one to five minutes is determined. Such spasms are produced by administration of of acetylcholine when it is desired to obtain evidence of the neutrotropic action and of 10 mg. of barium chloride when it is desired to demonstrate the musculotropic action.

It is apparent from this table that derivatives (I) possess a high antispasmodic activity:

Their musculotropic activity is very high. Thus the same effects are obtained with derivatives (I) as with papaverine hydrochloride, but at dosages which are, in some cases, ten times as small as with papaverine hydrochloride.

Their neurotropic (anticholinergic) spasmolytic activity is low with respect to atropine hydrochloride but is,

ine hydrochloride.

For example, the following results have been obtained with derivative 1717:

1The peristalsis of guinea-pig ileum is maintained, while it is supressed for papaverine and analogous compounds.

2The passage through the intestines in mice is only little perturbed at dosages of 10 mg./kg. I.V. and of 350 mg./kg. per os, i.e. at dosages corresponding to /3 of 3-There is no disturbance on the central nervous system in mice and the derivative exhibits only a very low depressent activity.

The properties of derivative 1717 have been confirmed in vivo by the antagonism to contracturant effects of a parasympatheticomimetic compound on the unstriated intestinal fibers, the very low hypertensive activity on the arterial pressure and the slight ganglioplegic activity on the autonomous nervous system.

Therefore, it is apparent from the above disclosure that derivatives (I) are particularly useful antispasmodic drugs for the digestive tract.

For such applications, the drug is advantageously formulated for oral administration in an amount of from 1 to 2 mg. per unit dose, for topical administration as ointments and collyria in the form of 0.1% and 0.5% solutions in a pharmaceutically administrable liquid vehicle, or for parenteral administration at daily dosages of from about 0.5 mg. to about 2 mg. for a mammal weighing about 70 kg.

Various pharmaceutical formulations together with their applications are given below.

Application: Hepatology.

Injectable solution Derivative (I) 2 Normal saline, to make 100 ml. for distribution in 1 ml. ampoules. Application: spasmolytic.

Coated tablets For use in gastroenterology: Derivative (I) per coated tablet Applications: spasmoplegic, and in gynecology.

Having now described my invention what I claim and desire to secure by Letters Patent is: 1. A compound of the formula 2. N-(2-bromo 4,5 dimethoxy-benzyD-N-{Z- [2-(6,6- dimethyl-norpinan 2 yl)ethoXy]-ethyl} morpholinium bromide.

3. N,N-diethyl-N-(2-bromo 4,5 dimethoxy-benzyl)- {2-[2-(6,6 dimethyl-norpinan 2 yl)ethoxy]ethyl} ammonium bromide.

4. N,N-dimethyl-N-(2-bromo 4,5 diethoxy-benzyD- {2-[2-(6,6 dimethyl-norpinan 2 yl)eth0xy]-ethy1} ammonium bromide.

5. N-(2-bromo 4,5 diethoxy-benzyl)-N-{2-[2-(6,6- dimethyl-norpinan 2 yl)ethoxy]-ethyl} morpholinium bromide.

6. N,N-diethyl-N-(2-bromo 4,5 diethoxy-benzyD- {2-[2-(6,6 dimethyl-norpinan 2 yl)ethoxy]-ethyl} ammonium bromide.

7. N-(2-bromo-4,5 dimethoxy-benzyD-N-{Z-[2-(6,6- dimethyl-norpinan 2 yl)ethoxy]-ethyl} piperidinium bromide.

8. N-(2-bromo 4,5 diethoxy-benzyl)-N-{2-[2-(6,6- dimethyl-norpinan 2 yl)ethoxy]-ethyl} piperidinium bromide.

No references cited.

NICHOLAS S. RIZZO, Primary Examiner J. TOVAR, Assistant Examiner US. Cl. X.R.

260293.56, 293.62, 326.5 R, 567.6 M, 563 R; 424248 

1. A COMPOUND OF THE FORMULA 